A .part3.rar file is part of a created with WinRAR or similar compression software. When a large collection of files (like thousands of TV logos) is too big for a single upload or storage limit, the creator splits it into multiple parts: .part1.rar , .part2.rar , .part3.rar , etc.
Once you extract the firmware binary files using the instructions above, you can load the chosen brand logo onto your TV hardware:
The safest option. Manufacturer logos do not affect TV performance.
RAR archives are common vectors for:
Method A: The USB Bootloader Force-Flash (For Soft-Bricked TVs)